/*
 * Copyright (C) 2015-2018 EPAM Systems
 *
 * This file is part of Indigo ELN.
 *
 * Indigo ELN is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Indigo ELN is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Indigo ELN.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

/* @ngInject */
function indigoHasAuthority(principalService, ngIfDirective) {
    var ngIf = ngIfDirective[0];

    return {
        restrict: 'A',
        priority: ngIf.priority,
        terminal: ngIf.terminal,
        transclude: ngIf.transclude,
        link: {
            pre: function($scope, $element, $attrs) {
                var authority = $scope.$eval($attrs.indigoHasAuthority);
                var isAuthorized = principalService.hasAuthority(authority);
                var initialNgIf = $attrs.ngIf;
                var ifEvaluator;

                if (initialNgIf) {
                    // If element has another ng-if directive it should be evaluated
                    ifEvaluator = function() {
                        return $scope.$eval(initialNgIf) && isAuthorized;
                    };
                } else {
                    ifEvaluator = function() {
                        return isAuthorized;
                    };
                }

                $attrs.ngIf = ifEvaluator;
                ngIf.link.apply(ngIf, arguments);
            }
        }
    };
}

module.exports = indigoHasAuthority;
